VMware Virtual Machine File System (VMware VMFS)

Techopedia explains VMware Virtual Machine File System (VMware VMFS)

VMware introduced virtual infrastructure (VI) to serve a need for a change in the traditional IT infrastructure that would provide cheaper, more reliable solutions for network and system administrators. With VI, everything is virtualized and administrators can get maximum output with minimum resources. In traditional IT infrastructure, hard drives, optical discs and tapes were being used as a storage media but in VI, VMFS provides a reliable and secure file system.

VMFS is a cluster file system that enables the virtualization world to avoid the limitations of other file storage systems. VMFS is designed specifically for a virtual environment and therefore, different facilities and benefits are derived.

The following are the key features of VMFS:

• It simplifies the storage issues of virtual machines as multiple virtual machines installed over different ESX servers can share a single shared storage area.
• Multiple instances of an ESX server run simultaneously and share VMFS.
• VMFS strongly supports the distributed infrastructure of virtualization by using various VMware services.

VMFS also has some limitations, including:

• It can only be shared with 64 ESX servers at a time.
• Logical unit numbers support is limited to a size of 2TB